Fix WiFi on Macbook Pro (Broadcom 4331) for Latest Kernel 3.11.0-19 (Ubuntu)

So, yesterday’s update to the latest kernel (3.11.0-19-generic) broke my Macbook Pro’s WiFi. Here’s how to quickly resolve the issue:

  1. Reboot into a previous Kernel, hopefully WiFi will work again.
  2. Then run these commands:
  3. $ sudo add-apt-repository ppa:mpodroid/mactel
    $ sudo apt-get update
    $ sudo apt-get install b43-fwcutter firmware-b43-installer
    $ wget http://www.lwfinger.com/b43-firmware/broadcom-wl-5.100.138.tar.bz2
    $ tar xf broadcom-wl-5.100.138.tar.bz2
    $ sudo b43-fwcutter -w "/lib/firmware" broadcom-wl-5.100.138/linux/wl_apsta.o
  4. Then reboot and you should be able to use the latest kernel with WiFi working once again.

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